1、List转Array![在这里插入图片描述](https://img-blog.csdnimg.cn/20210318181205576.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTQ1MjQxNg==,size_16,color_FFFFFF,t_70)
2、Array转List![在这里插入图片描述](https://img-blog.csdnimg.cn/20210318181258165.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTQ1MjQxNg==,size_16,color_FFFFFF,t_70)
3、代码(不需要单独引别的jar包)
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class Test {
public static void main(String[] args) {
List<String> list = new ArrayList<>();
list.add("张三");
list.add("李四");
list.add("王五");
String[] arrayStr = list.toArray(new String[list.size()]);
for (String s : arrayStr) {
System.out.print(s + ",");
}
System.out.println();
String[] array = {
"张三", "李四", "王五"};
List<String> newList = Arrays.asList(array);
newList.forEach(item -> {
System.out.print(item + ",");
});
}
}